pendebgast



(No Model.)

'M FORDER 8u T. H. PENDERGAST.

. GRAIN SEPARATOR.

No. 284,405. Patented Sept. 4, 1883.

INVENTOR =V ATToRNBxs.

WITNESSES: f@ l 4 l N. Pneu Phare-umugnpmr, wnsmngm". D. c

v UNITED STATES 4PATENT OFFICE.

MILTON FORDER AND TIMOTHY H. PENDERGAST, OF DASSEL, MINNESOTA.

GAlN-SEPARATOR.

SPECIFICATION formingpart of` Letters Patent No. 284,405, datedSeptember 4, 1'883.

To all whom it may conocerle,

Be it known that we, MILTON FoRDER ,an TIMOTHY H. PENDERGAs'r, both ofDassel, in

the county of Meeker and State of Minnesota,

having a series of annular compartments, and

obliquely-arranged chutes adapted to gather the grain in one part oftherevolution of `the screen in one compartment and discharge it in adifferent part of its revolution in another compartment; and itconsists, also, in ascreen of the aforesaid construction, in combinationwith an inner apertured cylinder and a return imperforate cylinder,substantially as hereinafter `more 'fully set forth and claimed. iReference is to be'had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts inall the figures.

Figure l is alongitudinal sectional elevation of our improved screen andthe case, the latter being in dotted lines. Fig. 2 is a longitudinalsection of the outer `screen-cylinder, and Fig. 3 is a transversesection of the screen o n line The rst part of the screen consists oftheinner screen-cylinder, a, of' perforated sheet metal or other approvedmaterial, into which the grain is discharged atthe upper andsmall-V `erend, b, from the spout c by the conveyer d or other approved means. Thiscylinder a and discharges the grain into cylinder e, to be carried backand discharged into the upper end of the outer screen, while the heads,

` straws, and` other large matter separated by the cylinder a from thegrain are discharged from the end-g, outside of the screen-caseseparately from the grain.

We divide the outer screen into four or more sections by means of theinternal annular iianges, h, to cause thegrain to'make one completecircuit of the screen in each section,

Application filed January 10, 1883. (No model.)

for more effectual action of the screen on it,

also for greater uniformity of action, which is attained by theconfinement of the grain in the sections separately until the duemeasure of actiontherein,while in the ordinary screens, where the wholeamount in the screen mixes together indiscriminately,some portions maypass along sooner than others, and thereby fail ofthe same measure oftreatment.

In each section of the outer screen, f, we

arrange an oblique chute or bucket, i, in such .cockleand other matterssmaller than the wheat, which matters are discharged into the hopper j,while the good grain is discharged throughthe spout k.

It will be seen that a screen of this improved construction will havenearly double the carangement of the outer screen makes it much i moreefficient for separating the grain than the ordinary form.

We make the screen a slightly increasing in size from the receiving endoutward, for causing the descent of the grain along it, and we increasethe size of the returning-cylinder e in Vpacity Afor a given space thanscreens of the ordinary kind, and, besides, the sectional ar- 7 5 theopposite direction, for carrying the grain back to the head of screenj'. Thislatter screen we make cylindrical in form, relying on the chutesto convey the grain along it; but it maybe in taper,form; or the wholemay be set with a downward inclination from the head, in whicharrangement the inner screen may be cylindrical also; but the taper ofthe returning-cylinder would have to be greater.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent y y 1. In a grain-separator, the screen havinga series of annular compartments, and obliquelyarranged chutes adapted,to gather the grainl apertured cylinder and the return imperforate 1o inone part of the revolution of the screen in cylinder, substantially asand for the purpose one compartment and discharge it in a differsetforth. ent part of its revolution in another compartment, substantiallyas set forth. l glDERGA/ST V2. In a grain-separator7 the screen providedy with annular compartments or sections7 formed Witnesses: by annularflanges7 and with the oblquely-ar- L. W. LEIGHTON, ranged chutes7 incombination With the inner f W.BEASAW.

